If the size of the requested space is zero, the behavior will be implementation-defined. The return value of the malloc could be a null pointer or it shows the behavior like that size is some nonzero value. So you must never use the malloc(0) in your C program.
Let see an example C program, where I am allocating memory using the malloc with size 0
#include
#include
int main (void)
{
int *piBuffer = NULL;
//allocating memory using
//the malloc with size 0.
piBuffer = malloc(0);
//make sure piBuffer is valid or not
if (piBuffer == NULL)
{
// allocation failed, exit from the program
fprintf(stderr, "Out of memory!\n");
exit(1);
}
*piBuffer = 10;
printf("%d\n",*piBuffer);
free(piBuffer);
return 0;
}
Output: Implementation-dependent.
